GAWRYSIAK-ZABŁOCKA, A. Entrance Fees to Polish National Parks. Zeszyty Prawnicze, [S. l.], v. 20, n. 3, p. 285–318, 2020. DOI: 10.21697/zp.2020.20.3.11. Disponível em: https://czasopisma.uksw.edu.pl/index.php/zp/article/view/7260. Acesso em: 24 aug. 2024.